Boiler cleaner



Aug. 2.1, 1934.

N. L. SNOW 1,971,020

BOILER CLEANER Filed Sept. 28, 1931 2 Sheets-Sheet 2 INVENTOR.

ATTORNEY.

Patented Aug. 21, 1934 1,971,020 BOILER CLEANER Norman L. Snow, NewCanaan, Conn., assignor to Diamond Power Specialty' Corporation,Detrolt, Mich., a corporation of Michigan Appiication september 2s,icsns'efin No. 565,437

13 claims. (01; `12a- 392) '1Q invention also embraces means for coolingthe nozzled tube, this being particularly applicable in those caseswhere the tube extends adjacent therboiler surfaces in regions of hightempera-v ture. 4 l X.

Other objectsand advantages of the invention will become more apparentas the followingdescription proceeds, particularly when reference is hadtothe accompanying drawings, wherein;r

Figure 1 is a side elevation of a boiler cleaner constructed inaccordance with the teachings of the invention, applied to a tubular`boiler o conventional construction;

A,FigureZ is an enlarged detail of the connection ,between the secondcleaning fluid pipe and its supply elbow; f

Figure 3 is an alternate arrangementof the detail shown in Figure 2 Y.Figure '4 is an enlarged detail of the control valve for the secondcleaning substance; l

Figure 5 is a view partly in sectionl and partly in elevation, along theline 5-5 of Figure 1V', with A.the bell crank mechanism misplaced, to"show thepperating mechanism for the aforementioned control valve;

Figure 6 is a View in fied control `Valve for stance. V. j

Referring then particularly to the drawings wherein like referencecharacters designate corelevation showing a modi-V the second cleaningsubfo responding parts throughout all views, the

numeral- 1 designates an automatic Valved boiler cleaner operating headof conventional construction. The head is supported fromboiler wall 4 byiioater 7 xed in'turn tov wall box 6 l mounted in opening 5 in the sidewall. Element 2jprovided with nozzles Sextends adjacent the boiler tubes3 rom which itmay be supported in any desired manner not shown. Thenozzles 8 correspond substantially in number tothe spaces adjacent Atheaforesaid boiler tubes 3.

Element 2 is joined by coupling 2'7 to swivel tube 39'which is rotatablyjournalled inthe Voperating head. Fixed tothe swivel tube 39 is thelarge gear A11 adapted to'be actuatedby .pinion 10 which, in turn, maybe actuated throughA suitable connections by the sheave wheel 9,.Mounted on the face of gear 11 isfthe cam 12 adapted upon rotation tomovelthe trigger-14 to depress valve stem 17, opening Valve 16, thusadmitting a cleaning fluid such as 50 air orsteam from the supply line38 to the head and ythence to the elementl2. y'The trigger 1liis'supported in the clevis 15 formed integrally with thegooseneck 13. Inmy prior application; Serial 692,094 meansare shown `for .automaticallyadmitting to the boiler cleaner operating head a second cleaningfluid-such as water;` possessing properties-:different from the cleaningviuid ordinarily used, "such, as steam'or air; The'presen't invention`utilizes this. basic principle,` employing a different mechanism andproviding means for insuring ydistributionof said second 'cleaningsubstance uniformly `along the Vlength of the element. o s At vthe upperportion of the gooseneckV 13 is provided an enlargement 18 to one end`of which is Xed an'elbow 19 through which thel secondcleaning'substance'is supplied; Valve 22 is proyided in the 'supplyline, this-valve being automatically actuated upon rotation of .thel element a ,predetermined amount, toA supply the second cleaning-substance.-A conventional lValve 25-for-manual operation Ais iurther providedinthe supply-line 26 whereby the second cleaning. substance may bemanually controlled as""desired. j

As best showninFigure 2, a second. nozzled l-tube20 is iixed asby'w'elding toelbow 19. This nozzled tube 20 extends centrally of theelement 2, Vnozzles 21 ybeing*provided along*4 its length for thedischarge ofthe second cleaning substance. Tube 20 `may be supportedapproximatelycentrallr ,0f element 2 asrbyloosely tting spdersnot shownY Operation oiv valve 22 A.may be eiiectedby trigger 14'as best shown inFigure 5, this trigger thus lserving to control the supply both of theprincipal cleaning substance. and the second cleaning substance. Bellcrank mechanism l0 is jtted to. extension 32 ci"vv triggerl 14 and maybe actuated by movement of the trigger 'to movejtheyalve stem 23laterally away :from the valve seat 24 as shown in-Figure l to admit thesecond cleaningsubstance. y In' thewarr-angement just described thedistributing pipe for the second cleaning substance is heldstatonarywhile thenozzledelement 2 ism-tats@ aroundA it, l the.preferable Position Qi the inner tube 20 is such that the nozzles 21point upwardly.

In Figure 3 is shown a connection of tube 20 on the elbow 19 such thatthe distributing pipe 20 may rotate with the element 2. Spider 28 isattached as by welding to tube 20', this spider being held by set screw29 .passing through coupling 27 between the element 2' and the swiveltube 39, both of which are suitably secured in said coupling.

The invention, moreover, resides in the provision of means for supplyingthrough the arrangement hereinbefore described a cooling medium such aswater tothe boiler cleaner element. The cooling medium such kas watermay be supplied in amounts depending upon the location of the boiler`cleaner element and the temperature to which it is exposed.

By reference to Figure 4 an auxiliary valve port 31 will be noted withwhich valve stem 30 co-operates. This auxiliary valve provides means toadmit to the boiler cleaner element a regulable supply of water at alltimes.

Thus by manipulation of valve stemk 30 Water may be admitted to theboiler cleaner element in an amount sumcient to cool the boiler cleanerelement to a temperature where it will live satisfactorily in any givenlocation. It will. be found convenient in many cases to admit to theelement water in just suicient amount to Vbe completely evaporated inthe boiler cleaner element without flow of water therefrom.V

In Figure 6 is shown an alternative arrangement of the control valve forthe cooling fluid whereinthe auxiliary valve 35 is locatedina by-passline 33Y around the main `body of the valve 22. This auxiliary valvemay. be controlled by thermostatic element shown at 36 which element isactuated by thermometer 34 which may be conveniently located in thebreeching or uptake 37 from the boiler furnace. The purpose of thisarrangement is to prevent the flow of cooling fluid, such aswater,through the by-pass and into the boiler .cleaner element 2 at periodswhen the boiler is banked or off the line. Under these circumstances theternperatures in the uptake 37 will be much lower thanwhen the boiler isin operationgthe thermostatic control being so arranged as to close thevalve 35Aunder these low temperature con-'- ditions and to open it underhigher .temperature conditions in the breaching when the boiler isnormally operating. Automatic means .are thus provided for insuring theshutting off of the cooling fluid supply to the blower element when theboiler is -notinnormal operation..

For the sake of convenience the invention has been described as'comprising a boilerV cleaner adapted for cleaning parts of a boiler. Itwill be apparent, however, that the invention may be incorporated indevices for cleaning similar types of apparatuses, and it is to betherefore understood that the term fboiler wherever used in thespecication or claims is to be construed as meaning a heat transferapparatus or fluid heater of any character, while the term boilercleaner is to be'construed as meaning a cleaner for any such apparatus.`

YWhile the invention has been described with considerable detail, it isto be clearly under-l stood that the description is for the purpose ofillustration only and is not 'definitive ofthe limits ofthe inventiveidea. The right is therefore reserved'to make such changes in thedetails of construction vand'arrangement of parts -f as will fall withinthe purview of the attached claims.

What I claim as my invention is:

1.,In a boiler cleaner, a source of supply of cleaning fluid, arotatable tube connected to said source of supply of cleaning fluid andprovided with nozzles for discharging said cleaning fluid, a source ofsupply of a second fluid, means to conduct said second fluid to saidrotatable tubeincluding a valve provided with two ports, one of saidports being normally open, and means dependent upon rotation of thenozzled tube for uncovering the other of said ports.

2. In a boiler cleaner, a source of supply of cleaning fluid, a tubeprovided with nozzles for the discharge of said fluid, a source ofsupply of a cooling fluid, means to conduct said cooling fluid to saidtube including a valve, and means dependent upon the temperature in saidboiler setting for controlling the actuation of said valve.`l v

3. In a boiler cleaner, a source of supply of cleaning fluid, arotatable tube provided with no'zzlesefor discharging said cleaningfluid, and means to supply a second fluid having cleaning and coolingproperties to said tube including two valved openings, one of which isautomatically controlled by the rotation of said tube andthe other ofwhich is constantly open to insure a constant supply of Vsaid secondfluid-tothesaid tube. i 4. In a fluid heater cleaner, a blower elementhaving nozzles for discharging a cleaning fluid, means for admitting acleaning fluid to said blower element for discharge therefrom, meansoperating to admit a second fluid to said blower element in timedrelation to the admission of theY cleaning fluid to the blower element,and means operable independently of the admission of 'cleaning fluid tosaid blower elementi for maintaining a constant supply of said secondmentioned fluid to said blower element.

5. In'a fluid heater cleaner, a blower element having nozzles fordischarging a cleaning fluid, a valve controlling the admission ofcleaning fluid to said `'blower element, a source' of supply of a secondfluid having cleaning and cooling properties,means operating upon theopeningA of said valve to admit a substantial quantity of said secondfluid to said blower element for discharge therefrom with the cleaningfluid, and means operable independentlyof the actuation of said valvefor admitting said second mentioned fluid to the blower elementirrespective of the supply of cleaning fluid to the element.A

6. In a fluid heater cleaner, a movable blower element provided withnozzles for discharging a cleaning fluid, means for supplying a cleaningfluid tosaid blower element, a source of supply ofa second fluid, avalve for controlling the ad? mission of lsaid second fluid tothe blowerelement, means for actuating said valve in timed relation to themovement of the blower element, and means providing a by-pass aroundsaid valve to insure a constant supply of said second fluid to theblower element irrespective of the movement thereof.

'7. In a boiler cleaner, a source of supply of cleaning fluid, a tubeprovided with nozzles for discharging said cleaning fluid, and'means toapply a liquid to the interior of said nozzled tube to cool the same byevaporation .of the liquid, said means operating in dependence upon thetemperature of the boiler'gases;

8, 1n a fluid heater cleaner, a blowerelement,

means for supplying cleaning fluid to said blower element under suicientpressure to effect a cleaning operation upon discharge of the cleaningfluid from the blower element, and means operating during the intervalswhen the cleaning fluid is not being supplied to the blower element todischarge a cooling fluid against said blower element at pointsthroughout the length thereof in such a manner that a substantialportion of said blower element is contacted by said cooling fluid.

9. In the fluid heater cleaner, a blower element, means for supplyingcleaning fluid to said blower element under sufcient pressure to effecta cleaning operation upon discharge of the cleaning liuid from theblower element, and means disposed within said blower element operatingduring the intervals when the cleaning fluid is not being supplied tothe blower element to discharge a cooling fluid against said blowerelement at points throughout the length thereof in such a manner that asubstantial portion of said blower element is contacted by said coolingfluid.

l0. In a fluid heater cleaner, a blower element, means for supplying acleaning fluid tosaid blower element under sufficient pressure to eiecta cleaning operation upon discharge of the cleaning fluid from theblower element, and means including a nozzled tube disposed within saidblower element operating during the intervals when the cleaning fluid isnot being supplied to the blower ing fluid against said blower elementat points throughout the length thereof in such a manner that asubstantial portion of said blower element is contacted by said coolingfluid.

ll. rIhe method of cooling a fluid heater cleaner tube which issubjected to high temperature during the intervals when said tube is notdischarging cleaning fluid which consists in discharging into contactwith said tube just enough liquid to be completely evaporated by theheat of the tube.

12. The method of cooling a fluidr heater cleaner tube which issubjected to high temperaelement to discharge a cool- Y ture during theintervals when the tube is not W discharging cleaning iluid whichconsists in discharging into contact with the interior of the tube justenough liquid to be completely evaporated by the heat of the tube.

13. The method of cooling a fluid heater cleaner tube which is subjectedto high temperature during the intervals when the tube is notdischarging cleaning fluid which consists in discharging into contactwith said tube at spaced points throughout the length thereof justenough liquid to be completely evaporated by the heat of the tube. i

NORMAN L. SNOW.

